#!/usr/bin/python2
# by skvidal
# ported by doteast to ansible 2.0
# gplv2+
# print out the ACTUAL freemem - not overcommitted value


import sys
from collections import namedtuple
from ansible.parsing.dataloader import DataLoader
from ansible.vars.manager import VariableManager
from ansible.inventory.manager import InventoryManager
from ansible import constants as C
from ansible.playbook.play import Play
from ansible.executor.task_queue_manager import TaskQueueManager
from ansible.plugins.callback import CallbackBase
from optparse import OptionParser


class OutputCallback(CallbackBase):
    def __init__(self, *args, **kwargs):
        super(OutputCallback, self).__init__(*args, **kwargs)
        self.unreachable = set()
        self.cpu_per_host = {}
        self.mem_per_host = {}
        self.mem_used_in_vm = {}
        self.cpu_used_in_vm = {}


    def v2_runner_on_unreachable(self, result):
        self.unreachable.add(result._host.get_name())

    def v2_runner_on_ok(self, result, *args, **kwargs):
        vhostname=result._host.get_name()
        if result._result['invocation']['module_args']['command'] == 'nodeinfo':
         self.cpu_per_host[vhostname]=int(result._result['cpus'])
         self.mem_per_host[vhostname]=int(result._result['phymemory'])


        if result._result['invocation']['module_args']['command'] == 'info':
         mem_used = 0
         cpu_used = 0
         for vm in result._result.keys():
          if vm not in ['invocation', 'changed', '_ansible_no_log']:
           if vm and type(result._result[vm]) == dict:
            mem_used += int(result._result[vm]['memory'])/1024
            cpu_used += int(result._result[vm]['nrVirtCpu'])
    
         self.mem_used_in_vm[vhostname]=mem_used
         self.cpu_used_in_vm[vhostname]=cpu_used

parser = OptionParser(version = "1.0")
parser.add_option('--host', default=[], action='append', help="hosts to act on, defaults to virtservers")
parser.add_option('--hosts-from-file', default=C.DEFAULT_HOST_LIST, dest="host_file", help="read list of hosts from this file")
(opts, args) = parser.parse_args(sys.argv[1:])

if not opts.host:
 hosts = ["virtservers"]
else:
 hosts = ';'.join(opts.host)



Options = namedtuple('Options', ['connection','module_path', 'forks', 'remote_user', 'private_key_file', 'ssh_common_args', 'ssh_extra_args', 'sftp_extra_args', 'scp_extra_args', 'become', 'become_method', 'become_user', 'verbosity', 'check', 'timeout', 'diff'])

options = Options(connection='ssh', module_path=None, forks=25, remote_user=None, private_key_file=None, ssh_common_args=None, ssh_extra_args=None, sftp_extra_args=None, scp_extra_args=None, become=None, become_method=None, become_user=None, verbosity=None, check=False, timeout=10, diff=False)


# create inventory and pass to var manager
loader = DataLoader()
inv = InventoryManager(loader=loader, sources=opts.host_file)
variable_manager = VariableManager(loader=loader, inventory=inv)

# create play with tasks
play_source =  dict(
        name = "vhost-info",
        hosts = hosts,
        gather_facts = 'no',
        tasks = [ dict(action=dict(module='virt', args=dict(command='nodeinfo'))), dict(action=dict(module='virt', args=dict(command='info'))) ]
    )
play = Play().load(play_source, variable_manager=variable_manager, loader=loader)

cb=OutputCallback()
tqm = None
try:
    tqm = TaskQueueManager(
              inventory=inv,
              variable_manager=variable_manager,
              loader=loader,
              options=options,
              passwords=None,run_additional_callbacks=False,
              stdout_callback=cb,
          )
    result = tqm.run(play)
finally:
    if tqm is not None:
        tqm.cleanup()

for vhostname in sorted(cb.mem_per_host):
    freemem = cb.mem_per_host[vhostname] - cb.mem_used_in_vm[vhostname]
    freecpu = cb.cpu_per_host[vhostname] - cb.cpu_used_in_vm[vhostname]
    print '%s:\t%s/%s mem(unused/total)\t%s/%s cpus(unused/total)' % (
        vhostname, freemem, cb.mem_per_host[vhostname], freecpu, cb.cpu_per_host[vhostname])
